Field emission device and field emission display having same

a field emission display and field emission technology, applied in the direction of discharge tube/lamp details, discharge tube/lamp details, tubes with screens, etc., can solve the problems of difficult electrons to pass through the gate electrode, low power consumption, and high brightness of the field emission display device,

Active Publication Date: 2015-04-07
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enhances electron passage and response speed while preventing electrical potential infiltration, resulting in improved brightness and reduced power consumption for field emission displays.

Problems solved by technology

Field emission displays do not need additional backlight; therefore, the field emission display devices have high brightness, low power consumption, and fast response speed.
However, the electrical potential provided by the anode may infiltrate to a surface of the cathode if the dimensions of the micropores are too great.
On the other hand, if the dimensions of the micropores are too small, it is difficult for the electrons to pass through the gate electrode due to its thickness of several to tens of mictons.

Method used

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  • Field emission device and field emission display having same
  • Field emission device and field emission display having same
  • Field emission device and field emission display having same

Examples

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Embodiment Construction

[0019]The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.

[0020]According to one embodiment, a field emission device 10 for a field emission display as illustrated in FIG. 1 includes an insulating substrate 12, a cathode 14, a number of spaces 20, and a CNT gate electrode 22. The cathode 14 includes a conductive layer 16 and a number of emitters 18. The conductive layer 16 of the cathode 14 and the spaces 20 are disposed on the insulating substrate 12. A shape of the insulating substrate 12 can be circular, square, rectangular, hexagonal, or polygonal. The insulating substrate 12 can be glass, porcelain, silica, ceramic, or any combination thereof. In one embodiment, the insulating substrate 12 is a por...

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Abstract

A field emission device includes a cathode and a carbon nanotube (CNT) gate electrode. The CNT gate electrode which is electrically insulated from the cathode includes a CNT layer and a dielectric layer. The CNT layer which has a surface includes a number of micropores. The dielectric layer is coated on the surface of the CNT layer and an inner wall of each of the micropores.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims all benefits accruing under 35 U.S.C. §119 from China Patent Application No. 201110296578.2, filed on Sep. 30, 2011 in the China Intellectual Property Office, disclosure of which is incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to a field emission device including a carbon nanotube (CNT) gate electrode with a number of micropores allowing electrons to pass through, and a field emission display having the field emission device.[0004]2. Description of Related Art[0005]Field emission displays do not need additional backlight; therefore, the field emission display devices have high brightness, low power consumption, and fast response speed.[0006]A conventional triode field emission display generally comprises at least one anode, at least one cathode, and a gate electrode between the anode and the cathode. The gate electrode provides an electrical potential to ex...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): H05B33/02H01J3/02H01J29/46H01J31/12
CPCH01J3/021H01J29/467H01J31/127H01J2329/463
InventorLIU, PENGFAN, SHOU-SHANWEI, YANG
OwnerTSINGHUA UNIV